判断载流导体在磁场中运动方向时，应使用右手定则。（    ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69491' and id < 4501689 and id<>'4501689' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69491' and id > 4501689 and id<>'4501689' order by id asc limit 5